Q: Is 1,321,815 a Prime Number?
A: No, 1,321,815 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1321815 can be evenly divided by 1 3 5 11 15 33 55 165 8,011 24,033 40,055 88,121 120,165 264,363 440,605 and 1,321,815, with no remainder.
Since 1,321,815 cannot be divided by just 1 and 1,321,815, it is not a prime number.